TY - JOUR A1 - Mak, C. S. K. A1 - Pentlehner, Dominik A1 - Stich, M. A1 - Wolfbeis, O. A1 - Chan, W. K. A1 - Yersin, H. T1 - Exceptional Oxygen Sensing Capabilities and Triplet State Properties of Ir(ppy-NPh2)3 JF - Chemistry of Materials N2 - Strong oxygen quenching following a Stern−Volmer behavior of Ir(ppy-NPh2)3 demonstrates the high technological potential for oxygen sensing applications. This compound exhibits a phosphorescence quantum yield of 70% and an emission decay time of 4.3 μs in deaerated solution. The electronic structure of the emitting triplet, being responsible for these properties, is investigated. KW - Oxygen sensing applications KW - Electronic structure KW - Triplet State Properties KW - Ir(ppy-NPh2)3 Y1 - 2009 IS - 21 ER - TY - JOUR A1 - Pentlehner, Dominik A1 - Grau, I. A1 - Yersin, H. T1 - Triplet State Properties of [Os(phen)2dppene]2+ in different host materials and host to guest energy transfer in PVK JF - Chemical Physics Letters N2 - Emission properties of [Os(phen)2(dppene)]2+ were investigated from 1.4 to 300 K in ethanol, PMMA, and PVK, a matrix which is frequently applied in OLEDs. These data provide the zero-field splitting values of the emitting T1 state and the individual decay times of its substates. The T1 state is assigned to be largely of MLCT character. The splittings change only moderately due to variation of the matrix, whereas the individual decay times are substantially affected. Further, energy transfer from the triplet state of PVK to [Os(phen)2(dppene)]2+ was studied by applying time-resolved emission spectroscopy and is assigned to be dominantly of Dexter type. KW - Os(phen)2(dppene)]2+ KW - Energy transfer in PVK KW - Electroluminescent devices Y1 - 2008 IS - 455 ER -